Get ready for a Bitcoin debit card: An obscure but growing digital currency is about to get a new link to the ph...

BitInstant employees Erik Voorhees, Charlie Shrem and Ira Miller are building real-world links for the Bitcoin virtual currency. NEW YORK (CNNMoney) -- An obscure but growing digital currency is about to get a new link to the physical world. Within the next two months, money transfer service BitInstant plans to launch the first internationally accepted Bitcoin-funded debit card. "People are always asking, 'Well, what can I spend Bitcoins on?'" says Erik Voorhees, BitInstant's head of communications. "You can finally just say, 'Everything.'" The Bitcoin economy sounds like something out of science fiction. Launched in 2009, it's a first-of-its-kind "cryptocurrency" consisting of mathematical tokens. Bitcoins aren't issued by any government or bank. The community-backed system is facilitated by complex cryptography and a peer-to-peer transaction network. Bitcoins are still f...